Here's why:
* Spelling: The "a" in "chase" is followed by a consonant ("s") and then a silent "e" at the end of the word. This is a common pattern for long vowel sounds in English.
* Sound: The vowel sound in "chase" is the same as the vowel sound in "say," "fate," and "rain" – all of which have long vowel sounds.
Let me know if you have any other words you'd like to check!